WixEdit is an editor for XML source code of the Windows Installer XML (WiX) toolset. WixEdit lets you create MSI and MSM setup packages with the WiX Toolset. It provides a visual representation of the dialogs and an easy way to edit the WiX source files.

Quivi is a comic / manga reader but also an general purpose image viewer for Windows which supports many file formats and compressed (zip, rar) files. It is aimed for fast & easy file browsing with keyboard or mouse.

APBS is a software package for the numerical solution of the Poisson-Boltzmann equation, a popular continuum model for describing electrostatic interactions between molecular solutes over a wide range of length scales. <http://www.poissonboltzmann.org/>.
Please register at http://goo.gl/LGVU5j before downloading!

Tadween is a powerful multilingual application allowing users to write Arabic in applications that support Unicode but doesn't fully support Arabic. This project is sponsored by Raouf Shabayek and ArabTeam2000.

Improved(download multiple files at once, config, GUI) client for the BitTorrent peer-to-peer sharing solution. This project is also the home of WebTorrent++ a BitTorrent client with a webbased user interface.

Linguistic Tree Constructor (LTC) is a tool for drawing lingusitic syntax trees. The user can define their own node categories, and can label each node with labels, also definable by the user. LTC supports "generic", X-Bar and RRG trees.

WideStudio is an Integrated Development Environment (IDE) for building window applications in C++, Ruby, Python an Perl for Windows, MacOSX, Linux, FreeBSD, SOLARIS and other unix and BTRON and T-Engine. This is open and free (under MIT/X Consortiun Lice

NxBRE is a lightweight Business Rule Engine (aka Rule Based Engine) for the .NET platform, composed of a forward-chaining inference engine and an XML-driven flow control engine. It supports RuleML 0.9 Naf Datalog and Visio 2003 modeling.

A full featured color picker that includes a color picker with zoom and area sampling, format converter, palette tool, seven built-in export formats, customizable formatting options (four built-in), and scripting support via MSScript.

A C and C++ Library + a compiler to create Adobe Flash SWF movies up to version 9 (v1.8.1). Supports nearly all the tags, includes an ActionScript compiler. Detailed docs and other tools: convert fonts to Flash, decompile Flash, jpg2swf. LASTEST IS 1.8.4

DesktopSaver is a lightweight system tray application that tracks your Windows desktop icons over time. If your icon positions are disturbed by an application crash or resolution change DesktopSaver can restore their original positions in a single click.